Motor oil is a key to your car, lubricating parts that mustn't grind together. And there are lots of potential signals to tell you if it has gone bad.

Unsure of what you're looking for when you pull the dipstick out of your engine? Worried about oil consumption? Here's our guide to monitoring oil levels.

How To Check The Oil Level With A Dipstick Now let’s get to the methods of checking the oil level. The first one involves a dipstick and a tissue or a rag. Just do the following: Park the vehicle on ...

Learn how to check and maintain the six essential fluids that keep your car running smoothly, from engine oil to windshield washer fluid.

CR’s experts explain how oil works, when to check oil, and what's the right oil to chooseBy Benjamin PrestonIf you’re the diligent type who checks your engine oil level at least once a month ...